Cemetery notes and/or description:Original location: Rhode Island Ave., Washington, DC. Also known as Harmonia Burial Grounds, located 2 miles from Washington, DC on Brentwood Rd. (1893) and as Columbian Harmony Cemetery. The cemetery was moved to Landover, MD in 1959. Now known as: National Harmony Memorial Park Cemetery, Landover MD.

In the late 1950s, National Harmony Memorial Park was contracted by the D.C. government to move the historically black Columbian Harmony Cemetery, which had fallen into disrepair.

According to a 2000 Washington Post article, 37,000 remains were disinterred and moved to what the Bells named National Harmony Memorial Park.